CIS 515 All Assignments CIS 515 All Assignments | Page 13

Imagine that you have been hired to fulfill their need of enhancing the data repository for their
current reservation processing system. Upon reviewing the system, you find that the data
structure holds redundant data and that this structure lacks normalization. The database has
the following characteristics:
•A table that stores all the salespersons. The table holds their employee id, first name, last
name and “Tours sold” field. The “Tours sold” field is updated manually.
•A table that stores tour customer data and tours sold. The table holds customer name,
address, city, state, zip code, tour(s) selected, number of persons in tour, and total amount
paid. The current structure will show the customer more than once, if the customer books
multiple tours.
•A tour table that is used as a tour rate sheet which holds the tours offered and the cost per
person. Tour rates vary every three (3) months depending on the tourist season.
Write a three to four (3-4) page paper in which you propose an enhanced database
management strategy. Your proposal should include the following:
1.Design a data model that will conform to the following criteria:
a.Propose an efficient data structure that may hold the tour operator’s data using a
normalization process. Describe each step of the process that will enable you to have a 2nd
Normal Form data structure.
b.Create naming conventions for each entity and attributes.
c.Conclude your data model design with an Entity Relationship Model (ERM) that will visually
represent the relationships between the tables. You may make use of graphical tools in
Microsoft Word or Visio, or an open source alternative such as Dia. Note: The graphically
depicted solution is not included in the required page length.
2.Construct a query that can be used on a report for determining how many days the
customer’s invoice will require payment if total amount due is within 45 days. Provide a copy of
your working code as part of the paper.
3.Using the salesperson table described in the summary above, complete the following: